Terminal post for electric appliances



Ju y 'M.L .W AF\ 1N ER 1,769,325

I TERMINAL POST FOR ELECTRIC APPLIANCES Filed May 19, 192a ,INVENTOR. WM

ATTORNEYS Patented July 1, 1930 UNITED STATES PATENT OFFICE MAURICE LEEWARNER, F DOVER, OHIO, ASSIGNOR '10 DOVER MANUFACTURING COMPANY, OFDOVER, OHIO, A CORT-ORATION OF OHIO TERMINAL POST FOR ELECTRICAPPLIANCES Application filed May 19,

This invention relates to improvements in terminal posts for electricappliances.

It is the object of the invention to provide a novel and simplified formof inexpensive terminal post which is economical to manufacture andwhich is adapted for better electrical connection with existing forms ofspring clip plugs than terminal posts now available.

The ordinary form of-terminal plug is provided internally with twospring clips adapted to receive the terminals of electrical appliances.Each of these clips usually comprises an axially split tube, the partsof 15 which are resiliently yieldable and are ordinarily flanged alongtheir side margins. The

ordinary terminal post receivable in such a clip comprises a shortlength of rod mounted on the electric appliance and adapted to 2 projectinto the open end of the tubular portion of the clip. In such a device,it is found that due to necessary irregularities in manufacture therewill be a maximum of four lines of contact between the clip and the 25terminal post, assuming that the radius of curvature of the parts of theclip is less than that of the post. If, however, the radius of curvatureof the clip is greater than that of the post, there may be but two linesof contact to establish an elecrical connection betwesn the parts.

The peculiar form of terminal hereinafter disclosed is not only adaptedfor economical manufacture in that it may be stamped from r a singlepiece of sheet metal, but it is found, moreover, that in the ordinaryconnector clip six lines of contact are established, thereby making amore perfect electrical connection than other forms of terminal postsnow available. 7 I

In the drawings Figure 1 is a side elevation of a terminal postembodying this invention as applied to a fiat iron element;

Figure 2'is a front elevation of a fragment of a flat iron elementcarrying two such posts;

Figure 3 is a plan View of the parts shown in Figure 2;

Figure 4 is a detail similar to Figure 1 3 showing the application to apost embody- 1928. Serial a. 278,941.

ing this invention of a standard clip such as is found in the ordinaryconnector plug, such clip and the terminal being illustrated in section;

Figure 5 is a detail view in enlarged sec tion taken in the planeindicated by the line 55 in Figure 4.

Like parts are identified by similar reference numerals throughout theseveral views.

While the application of this invention is by no means limited to flatirons, I have chosen by way of illustration to'show at a flat iron bodyupon which is a sheet of dielectric material at 11 to support theimproved terminal posts embodying this invention.

Each such terminal post comprises a flat base portion 15 seated upon thedi-electric sheet 11 and apertured'to receive a cap screw 16 which holdsit in place. A di-electric bushing 17 and gasket 18 insulate the capscrew from the base plate 15 of the terminal post. Each terminal postbase is apertured at 19 to receive connection with the conductors 20whichlead to the resistance element in the interior of the iron.

The terminal post proper comprises strip which is integral with baseportion 15 and is somewhat narrower than such portion, the surplusmaterial being used to form the longitudinally extending rib 26 which issemitubular and from which the sides of the strip project at 28 likemarginal flanges. v

The spring clip device herein illustrated is typical of the spring clipwhich will be found in the ordinary connector plug and is designated byreference character 30. It comprises the relatively yieldable clipelements.

31 and 32 each of which is semi-tubular in form and provided withlateral flanges which are designated at 33 and 8 1, respectively.

It will be observed in Figure 5 that the being designated at 35 and 36in Figure 5. It will further be noted that each of the flange portions28 of the terminal post is engaged by both of the flanges 33 and 34:,respectively, of the clip elements 31 and 32, thereby providingadditional lines (and sometimes planes) of contact at 37 88-, 39, and4:0. It will be observed, therefore, that a terminal post embodying thisinvention contacts with a standard clip to provide more lines of contactthat it is possible to establish with a terminal post of rod form.

While a device embodying this invention thus serves the primary purposeof providing an excellent electrical contact, it further complies withthe statement of objects above in that it may be stamped integrally ofsheet metal, thereby rendering it far less expensive to manufacture thanordinary forms ofterminal posts. 1

I claim:

1. As a new article of manufacture, a terminal post comprising alongitudinal ribbed sheet metal contact in the form ofa sector of a tubeprovided with oppositely extending marginal flanges.

2. 'As a new article of manufacture, a terminal post comprising a flatbase portion, and an integrally formed sheet metal contact portiondisposed at an angle with reference to said base portion and providedwithin reduced transverse dimensions with a central rib of arcuatecross-section and oppositely disposed marginal flanges, said rib being3; adapted to reinforce said contact portion while providing additionalmeans of contact for the standard plug clip.

3. As a new article of manufacture, a ter minal post having a portionadapted to com- 40 prise a plug contact and consisting of a; sheet metalmember having marginal por tions substantially in the same common planeandoined by a longitudinally extend v ing rib of arcuate cross section,said rib andflangesbeing shaped to provide multiple contaclis with aplug socket engageable therewit 4. As a new article of manufacture, asheet; 7 metal terminal post comprising asubstantially planiform baseand an integral con-- tact portion extending upwardly therefrom, andprovided intermediate its margins with a longitudinally extending ribwhereby the overall transverse dimension between such margins is'reducedas compared with the- V transverse dimension of said base, said marginsbeing substantially in the same plane-- and receivable between thecomponent parts:

I of a split plug terminal, with which said rib.

is additionally engageable,

' MAURICE LEE 'WARNER;

